I rented this place while I was doing a course and really enjoyed my 5 week stay. The location is excellent. The BTS and MRT are a 5 minute walk away, and it's easy to flag a taxi at any time of the day. If you walk further down Silom Road, you will find yourself in the beautiful Lumpini Park.
The district is very lively and filled with people way after midnight, but the street where the building is located is very quiet, so it's easy to sleep through the night uninterrupted when you want to.

There are a lot of restaurants and bars in the area, street food to buy during the day, at least three 7/11 stores and a nice 24-hour deli at Max Value on the ground floor of the United Center. Monday to friday the side streets are filled with street food vendors and several stands where you can get a coffee.

The hosts were extremely friendly and helpful and kind enough to meet me at the airport. The staff at the building are very nice and eager to help as well, at any time of day.

The building itself is quite nice. I didn't use the gym, which seems to be popular, but the swimming pool is reasonably large and mostly empty, and I enjoyed my daily swim. The view from the pool at night is beautiful.
The coin launderettes are easy to use and reasonably cheap: 40 baht per load. The dryers are 10 baht for every 15 minutes.

The room itself is spacious, clean and quiet with a very nice bed and an amazing rainshower in the bathroom. There is ample storage space and the AC does a great job combating BKK heat. The Wi-Fi gets a bit slow during the evening, but otherwise works perfectly. I feel like I couldn't have picked a better accomodation.